DOI: 10.1175/JCLI-D-18-0474.1
Scopus记录号: 2-s2.0-85059002169
论文题名: Teleconnection between the Atlantic meridional overturning circulation and sea level in the Mediterranean Sea
作者: Volkov D.L. ; Baringer M. ; Smeed D. ; Johns W. ; Landerer F.W.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2019
卷: 32, 期: 3 起始页码: 935
结束页码: 955
语种: 英语
英文关键词: Mediterranean Sea
; Meridional overturning circulation
; North Atlantic Ocean
; Ocean dynamics
; Oceanic variability
; Sea level
Scopus关键词: Atmospheric pressure
; Mediterranean sea
; Meridional overturning circulations
; North Atlantic Ocean
; Ocean dynamics
; Oceanic variabilities
; Sea level
英文摘要: The Mediterranean Sea can be viewed as a "barometer" of the North Atlantic Ocean, because its sea level responds to oceanic-gyre-scale changes in atmospheric pressure and wind forcing, related to the North Atlantic Oscillation (NAO). The climate of the North Atlantic is influenced by the Atlantic meridional overturning circulation (AMOC) as it transports heat from the South Atlantic toward the subpolar North Atlantic. This study reports on a teleconnection between the AMOC transport measured at 26.5°N and the Mediterranean Sea level during 2004-17: a reduced/increased AMOC transport is associated with a higher/lower sea level in the Mediterranean. Processes responsible for this teleconnection are analyzed in detail using available satellite and in situ observations and an atmospheric reanalysis. First, it is shown that on monthly to interannual time scales the AMOC and sea level are both driven by similar NAO-like atmospheric circulation patterns. During a positive/negative NAO state, stronger/weaker trade winds (i) drive northward/southward anomalies of Ekman transport across 26.5°N that directly affect the AMOC and (ii) are associated with westward/eastward winds over the Strait of Gibraltar that force water to flow out of/into the Mediterranean Sea and thus change its average sea level. Second, it is demonstrated that interannual changes in the AMOC transport can lead to thermosteric sea level anomalies near the North Atlantic eastern boundary. These anomalies can (i) reach the Strait of Gibraltar and cause sea level changes in the Mediterranean Sea and (ii) represent a mechanism for negative feedback on the AMOC. © 2019 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117239
Appears in Collections: 气候变化与战略
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Recommended Citation:
Volkov D.L.,Baringer M.,Smeed D.,et al. Teleconnection between the Atlantic meridional overturning circulation and sea level in the Mediterranean Sea[J]. Journal of Climate,2019-01-01,32(3)